From a92ffdf8a9b09f8fae9a8f418f87f30a5e459570 Mon Sep 17 00:00:00 2001 From: Alex Elder Date: Tue, 30 Oct 2012 19:40:33 -0500 Subject: rbd: allow null image name Format 2 parent images are partially identified by their image id, but it may not be possible to determine their image name. The name is not strictly needed for correct operation, so we won't be treating it as an error if we don't know it. Handle this case gracefully in rbd_name_show(). Signed-off-by: Alex Elder Reviewed-by: Josh Durgin --- drivers/block/rbd.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index a8521338bf46..28052ff679ca 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -1982,7 +1982,10 @@ static ssize_t rbd_name_show(struct device *dev, { struct rbd_device *rbd_dev = dev_to_rbd_dev(dev); - return sprintf(buf, "%s\n", rbd_dev->spec->image_name); + if (rbd_dev->spec->image_name) + return sprintf(buf, "%s\n", rbd_dev->spec->image_name); + + return sprintf(buf, "(unknown)\n"); } static ssize_t rbd_image_id_show(struct device *dev, -- cgit v1.2.3